Deep drilling machine



Jan. 13, 1953 R U 2,625,060

DEEP DILLING MACHINE Filed May 28, 1948 5 Sheets-Sheet l IN VEN TOR.

52 6/" 6. (f /46%; BY

224 y/zw Jan. 13, 1953 R. G. CUDINI DEEP DRILLING MACHINE 3 Sheets-Sheet 5 Filed May 28, 1948 0. N v 4 m a 4 I M, J Y |..|h .HU- \Z n W 0 I m w i Patented Jan. 13, 1953 DEEP DRILLING MACHINE Roger G. Cudini, Birmingham, Mich., assignor to Moynahan Bronze 00., Detroit, Mich., a corporation of Michigan Application May 28, 1948, Serial No. 29,690

13 Claims.

The present invention relates to an improved drilling machine and, more particularly, to an improved machine for accurately drilling holes with an elongated drill through a plurality of spaced projecting portions on a workpiece such as a hinge or connector part, or the like.

It is an object of the invention to provide an improved drilling machine for accurately drilling apertures through a plurality of spaced projecting portions of an elongated workpiece thereby insuring proper cooperation between complementary mating workpieces.

A further object of the invention is to provide an improved drillin machine for drilling holes in spaced projecting portions of a work piece of considerable length, which machine provides a minimum bearing surface engaging the drill.

Another object of the invention is to provide an improved drilling machine adapted for drilling a hole through a plurality of spaced projecting portions of a workpiece and including retractable drill positioning members movable with the drill and adapted to project between projecting portions of the workpiece to engage and support the drill adjacent its cutting end during the entry of the cutting end into each of the projecting portions of the workpiece.

It is also an object of the invention to provide a drilling machine incorporating improved means for supporting an elongated drill during a drilling operation.

It is also an object of the present invention to provide an improved drilling machine of the above type adapted for drilling a hole through a plurality of spaced projecting portions on a workpiece, which projecting portions are disposed along a general or gradual curve.

Other objects of the invention wil become apparent from a consideration of the following specification, the appended claims and the ac-- companying drawings wherein:

Figure 1 is a broken view in elevation of a drilling machine embodying the invention;

Fig. 2 is a broken plan view of the construction illustrated in Fig. 1;

Fig. 3 is a broken enlarged sectional view of the construction illustrated in Fig. 1 taken substantially along the line 3--3 thereof;

Fig. 4 is an enlarged fragmentary sectional view of the construction illustrated in Fig. 3 taken substantially along the line 4-4 thereof;

Fig. 5 is a fragmentary sectional view of the construction illustrated in Fig. 4 taken along the line 5- 5 thereof;

Fig. 6 is a broken enlarged sectional view of the construction illustrated in Fig. 2 taken substantially along th line 66 thereof;

Fig. 7 is a broken plan view illustrating the relative position of the parts after the drill has advanced partially through the workpiece.

Fig. 8 is a broken elevational view of a modilied embodiment of the invention;

Fig. 9 is a broken plan view, having parts broken away, of-the construction illustrated in Fig. 8'; and

Fig. 10 is a broken enlarged sectional view of the construction illustrated in Fig. 9 taken substantially along the line lill0 thereof.

In general, the present invention is directed to a machine for drilling holes through a plurality of spaced projecting portions of an elongated workpiece. From a complete understanding of the present invention, it will be appreciated that the improvements thereof, while not so specifically limited, have particular utility in the drilling of pintle holes in hinge or connector parts. It will be appreciated that in the construction of mating hinge parts it is important that all of the pintle holes throughout the lengths of the mating hinge parts are maintained concentric to insure that the hinge parts will properly mate. Similarly, in mating connector parts, the spaced projecting portions of which are disposed along a curve, it is likewise important that the holes be accurately located in order that the connector parts will properly mate and receive the connecting pin or rod.

Referring to the drawings, and more particularly, to Figs. 1-7 inclusive, the drilling machine 29 there illustrated is adapted for drilling a workpiece 22 having a plurality of aligned projecting portions 24 disposed along its length. The illustrated workpiece 22 is an elongated hinge part having equally spaced projecting portions 24 adapted to receive therebetween similar projecting portions of a complementary mating hinge member. The machine 29 of the present invention is adapted to drill longitudinally through the hinge 22 to provide a pintle opening 26 in each of the projecting portions 24.

The drilling machine 20 generally comprises a base 28 mounted on suitable supporting legs 30 and carrying a workpiece support generally indicated at 32 and a carriage generally indicated at 34 mounted on the base 28 for sliding movement longitudinally thereof for moving a drill 36 carried by the carriage St to and from and through the workpiece 22.

The work support 32 generally comprises a plate 38 disposed centrally of and extending longitudinally of the base 28 adjacent the left hand end thereof as viewed in Figs. 1 and 2, and secured to the base 28 by a plurality of screws 40. An elongated workpiece supporting block 42 is disposed centrally of and extends longitudinally of the plate 30 and is secured thereto by screws 44 extending upwardly through the plate 38 and threading into the block 42. The upper surface of the workpiece supporting block 42 is formed to provide a plurality of longitudinally spaced upwardly extending projections 46 having accurately aligned V-shaped surfaces 48 individual to and adapted to engage and support the spaced projecting portions 24 formed on the workpiece 22. The workpiece 22 is securely held in the position illustrated with the projectin portions 24 seated on the V-shaped surfaces 48 of the block 42 and the leaf portion 50 of the workpiece extending vertically upwardly, by a plurality of screw-operated clamps 52 mounted above the block 42 on a beam member 54 mounted on and extending longitudinally of the base 28.

The carriage 34 comprises a motor carrying portion 56 which is mounted in a centrally disposed longitudinally extending groove or slide 58 formed. in the base 28. The carriage portion 56 mounts a drill chuck 60 adapted to receive and rotate the elongated drill 36, and a motor 62 which drives the drill chuck 60 through any suitable means such as the wheel and belt assembly indicated at 64. The carriage 34 also includes portions 66 and 68 disposed adjacent the leading or cutting end of the drill 36 and which support means generally indicated at I for accurately positioning the cutting end of the drill during the drilling operation. The carriage portions 66 and 68 are adapted to slide along parallel ways I2 and 14 extending longitudinally of the base 28 on opposite sides of the centrally disposed groove 58. These carriage portions 66 and 68 are connected to the motor carrying carriage portion 56 by means of rods I6 and 18.

In the preferred embodiment illustrated, move 3 ment of the carriage 34 longitudinally of the base 28 to move the drill 36 to and from and through the workpiece 22, is effected by means of a hydraulic cylinder and piston motor 80.

Fluid under pressure is supplied to the motor 80 from a tank 82 through a suitable conventional hydraulic valve generally indicated at 84 by a pump 86 driven by a motor 88.

The present invention also contemplates the provision of means generally indicated at 90 for r supporting the elongated drill 36 at a plurality of points intermediate the drill chuck 69 and the workpiece 22. For this purpose, a plurality of pairs of opposed drill supporting elements 92 and 94 are provided, which are mounted on individual supporting plates 96 and 98 fixed to plate members I00 and I02 which extend longitudinally of and are secured to the base 26 at opposite sides of the central groove or slide 58. As best illustrated in Figs. 6 and '7, the plates 96 and 98 are provided with hearing blocks I04 which slidably mount the elements 92 and 94 for movement transversely of and toward and away from the drill 35. These elements 92 and 94 are yieldably held in the position illustrated in Fig. 6 by coil springs I06 surrounding the elements 92 and 94 between the bearing blocks I04 and engaging the outer of these bearing blocks at their outer ends and engaging collars I08 fixed to the drill supporting elements at their 4 inner ends. The collars I08 carry an upwardly projecting arm IIO mounting a roller II2 on its upper end adapted to be engaged by cam plates H4 mounted on the motor supporting portion 56 of the carriage 34 to move the drill supporting elements 92 and 94 upwardly, as illustrated in Fig. '7, as the carriage moves along the base 28.

At their inner ends, the elements 92 and 94 carry drill engaging jaws H6 and I I8 respectively. These jaws are provided with V-shaped surfaces I26 and I22 respectively adapted to engage and support the drill 36, the jaw I I 8 being bifurcated, as best illustrated in Figs. 2 and 7, to receive the jaw element II 6 and -flermit the V-shaped surfaces I and I22 of both jaw elements to cooperate in supporting the drill It will now be appreciated that, when the carriage is in the fully retracted position illustrated in Figs. 1 and 2, the jaws I I6 and I I8 of each pair of drill supporting elements 82 and 94 are in position to support the drill 36 thereby providing support for the drill 36 at a plurality of points spaced along its length. It will also be appreciated that, as each pair of drill supporting elements 92 and 64 is approached by the motor carrying portion 56 of the carriage 34, the cam plates I I 4 mounted on the motor carrying portion 56 engage the rollers I2 to move the elements 92 and 94 outwardly and disengage the jaws I I6 and I I8 from the drill 36 and move them out of the path of the motor carrying portion 56 as it advances along the central groove 58 of the base 28 during the drilling operation. It will also be noted that the cam plates H4 permit the jaws H6 and H8 to close after passage of the cam plates I I4 which also are similarly shaped at both ends. During the return movement of the carriage 34, the drill supporting elements 92 and 64 are similarly retracted to move the jaws H6 and II8 from the path of the carriage. As the cam plates I I 4 pass to the right, as viewed in Figs. 2 and '7, during the return movement of the carriage 34 the drill supporting elements 92 and 94 are then permitted to be moved inwardly so that the jaws I I6 and I I8 on their inner ends again engage and support the drill 36.

The above mentioned drill positioning means I0 mounted on the carriage portions 66 and 68 is best illustrated in Figs. 3, 4 and 5 and comprises a pair of opposed drill supporting members I36 and I32 disposed transversely of the base 28 and slidably mounted in housings I34 and I36 respectively for movement toward and away from each other. The adjacent end surfaces of the members I and I32 are grooved as indicated at I38 in Fig. 4 for engaging and supporting the drill 36. In spaced relation to their inner ends, the members I30 and I32 carry collars I and I42 respectively secured thereto for movement therewith and disposed to engage the opposite lateral faces of the work supporting block 42 as the adjacent end faces of the members I39 and I32 move into engagement. The members I38 and I32 are held against rotating, so that the grooves I38 will at all times be properly disposed for engaging the drill 36, by pins I43 mounted on the collars I40 and I42 eccentrically of the members I30 and I32 and projecting through closely fitting apertures in the housings I 34 and I36.

The drill supporting members I30 and I32 are yieldably held in the position illustrated in the drawings by spring means disposed within the housings I34 and I36 and comprising a collar I44 secured to the drill positioning member and a coil spring I46 surrounding the drill positioning member and engaging the housing at its outer end and the collar I66 at its inner end.

It will be appreciated that the drill positioning members I36 and I32 move longitudinally of the base 23 with the carriage 34 and, accordingly, means are provided for withdrawing the drill positioning members I66 and I32 from engagement with the drill as to prevent their engaging and becoming jammed against the projecting portions 24 of the workpiece 22 through which the drill 36 passes. This means is similar for both of the drill positioning members I36 and I32 and comprises conventional solenoid means generally indicated at I46 individual to the members I36 and I 32 adapted to move the associated drill positioning member outwardly against the action of the spring I46.

To provide for the automatic withdrawing of the Work positioning members I36 and I32 during the desired portions of the drilling operation, the solenoids I66 are connected to a suitable electric switch I 56 mounted on the base 26 and having a cam follower arm I52 adapted to actuate the switch and which is resiliently urged against a cam plate mounted on the carriage connecting rod 18. It will be appreciated that the shape of the cam plate I5 3 will correspond to the dimensions and spacing of the projecting portions 26 of the workpiece 22, the cam plate !56 being is started in each of said projecting portions 24 before the members I66 and I32 are moved into interfering engagement with the projection portions 2:; of the workpiece.

It will be appreciated that, as best illustrated in Fig. 4, the flutes of the drill preferably extend back from the leading or cutting end of the drill for only a short distance thereby reducing the tendency of the drill to increase the size or alter the of the holes in the projecting portions 26 through which the cutting edge of the drill has passed.

It will be appreciated that a suitable cutting fluid or coolant is preferably applied to the drill and the workpiece 22 by any suitable means (not shown).

The modified embodiment of the invention illustrated in Figs. 8, 9 and is a drilling machine generally indicated at I66 and adapted for drilling a connector part I62 having a plurality of spaced projecting portions I64 disposed along a gentle or gradual curve, as best illustratedinFigQ. The drilling machine I66 is in many respects similar to the drilling machine 26 above described, but is provided with a work support generally indicated at I655 dil -Bering from the work support 22 of the machine 26, as hereinafter described. The machine I66 further diifers from the above described machine 26 in that it contains no carriage portion corresponding to the carriage portion 66 oi the machine 26, and in that the carriage portion I66, corresponding to the carriage portion 62 of the machine 26, carrier drill positioning means generally indicated at I16 and differing from the above described drill positioning means '56 as indicated in detail hereinafter.

The work support 566 comprises a work supporting plate I12 extending longitudinally of the base I12 and fixed to a way or slide I16 thereof, corresponding to the way 12 of the above described machine 26. The workpiece I62 is sup- 6. ported upon the plate I 12 on a plurality of blocks I18 which rest upon the plate I12 and receive the downwardly extending projecting portions I64 of the connecting part I62. The workpiece I62 is supported so that the projecting portions I64 are disposed along a gentle or gradual curve lying in a plane parallel to the plane of the supporting plate I12. The edge of the plate I12 presenting toward the carriage portion I68 is formed to provide a cam or guide surface I which is disposed along a similar gradual or gentle curve parallel to the curve along which the workpiece projecting portions I62 are disposed. The workpiece I62 is securely clamped down against the blocks I18 by screw-operated clamps I82 which engage an upwardly projecting flange I64 of the workpiece and.

are mounted along a bar I86 extending longitudinally of and mounted on the base I14 and corresponding to the member 54 of the. above described machine 26.

In the machine I66 the drill positioning means I16 comprisesa C-shaped connecting member I88 disposed to straddle the bar I66 and the workpiece I62 during movement of the carriage longitudinally of the base I14 as during a drilling operation. At its opposite ends, the C-shaped member I88 terminates in horizontally outwardly extending plate portions I66 and I92 which are secured to bearing blocks I94 and I66 disposed on opposite sides of the workpiece I62 by screws I68. To prevent relative movement of the blocks I94 and I96, the C-shaped member I88 of the construction illustrated is T-shaped in cross section. Opposed drill positioning members 266 and 262 are disposed transversely of the base I14 and slidably mounted in the blocks I94 and I66 respectively for movement toward and away from the drill. At their inner adjacent ends, the drill positioning members 266 and 262 carry jaw elements 264 and 266 respectively the adjacent end faces of which are adapted to engage the drill to accurately position it during its entry into each of the projecting portions I64 of the connector part I62. The members 266 and 262 and, consequently, the jaws 264 and 266 carried thereby, are urged inwardly and yield-ably held in the position illustrated in Fig. 10, in which the jaws engage and position the drill, by springs 266 and 2H! which are disposed within the blocks I94 and I96 respectively and engage outwardly presentin shoulders on the drill positioning members 266 and 262.

As in the above described machine 26 the drill positioning members 266 and 262 are moved outwardly against the action of the springs 268 and 2l6, to prevent interference between the jaws 264 and 266 and the projecting portions I64 of the workpiece I62 during movement of the carriage along the base I 14, by solenoids 2 I 2 and 2 I4 which are suitably mounted on the outwardly extending plate portions I66 and I62 of the C-shaped member I88. The shape of the drill positioning member 266 and 262 outwardly of their engagement with the springs 268 and 2I6, and their sliding engagement with the blocks I94 and I96 is such as to prevent rotation of the members 266 and 2532 in the blocks I94 and I96 and, accordingly, insure that the jaw elements 264 and 266 which are fixed in the outer ends of the drill positioning members 266 and 262 will, at all times, be disposed in the proper rotative position for engaging the drill.

It will be appreciated that during the drilling of the workpiece I62 the drill positioning means I16 must follow the curve along which the work projecting portions I64 of the workpiece are disposed. Accordingly, the machine I60 includes means mounting the entire drill positioning assembly I for movement transversely of the base I74 during movement of the carriage longitudinally thereof. This means comprises a plate 2| 6 which is mounted in the carriage portion I68 for movement transversely of the base I14 and which includes laterally extending edge portions 2I8 receivedin complementary grooves extending transversely of the carriage portion I68 for preventing vertical or pivotal movement of the plate 2 I6 relative to the carriage portion I68. The drill positioning assembly I10 is secured'to the plate 2 I 6 by means of screws 220 extending through the plate 2I6 and threaded into the block member The position of the drill positioning means I10 and the plate 2I6 upon which it is mounted,

transversely of the base I14, is at all times con- 7 trolled by the cam surface I80 formed on the workpiece supporting plate I12, which cam surface I80 is continuously engaged by a roller 222 mounted on the inner face of the block member I 94. The plate 2 I 6 is urged inwardly at all times during the drilling operation to hold the roller 222 against the cam I 80 by a suitable hydraulic cylinder and piston motor 224 which is anchored to a laterally outwardly extending arm 226 mounted on the carriage portion I68 and which acts against the plate 2I6 to continuously urge it inwardly or to the left as viewed in Fig. 10.

In the machine I60 only one carriage connector rod 221, corresponding to the rod I8 of the machine 20, is required, due to the elimination of the carriage portion 66.

It will be appreciated that during operation of the above described machine I60 the drill is actually distorted to follow the curve along which the projecting portions I64 are disposed during each drilling operation. To insure the proper positioning of the cutting end of the drill during its entry into each of the workpiece projecting portions I 64, a locating finger 228 is mounted on the inner end of the drill positioning member 200 and is adapted to engage the workpiece 62 adjacent the base of the projecting portions I64. This construction insures an accurate positioning of the drill and compensates for any slight inaccuracies which might result from the shaping of or posi- I80 on the supporting herein, it will be readily appreciated by those skilled in the art that numerous modifications and changes may be made without departing from the spirit of the present invention.

What is claimed is:

1. A deep drilling machine for drilling an opening through a plurality of spaced projecting portions of a workpiece such as a hinge or the like, said machine comprising a base, a carriage mounted on said base for movement therealong, means mounted on said carriage for mounting and rotating an elongated drill, means mounted on said base for holding a workpiece to be drilled, means for moving said carriage along said base to move said drill toward and through said workpiece. drill positioning means mounted on said carriage in spaced relation to said first named means and including drill supporting elements adapted to be moved between said spaced projecting portions of said workpiece to move into and out of supporting engagement with said drill,

and means mounted on said carriage for moving said elements into and out of said supporting engagement with said drill.

2. A deep drilling machine for drilling an opening through a plurality of spaced projecting portions of a workpiece such as a hinge or the like, said machine comprising a base, a carriage mounted on said base for movement therealong, means mounted on said carriage for mounting and rotating an elongated drill, means mounted on said base for holding a workpiece to be drilled, means for moving said carriage along said base to move said drill toward and through said workpiece, drill positioning means mounted on said carriage in spaced relation to said first named means and including drill supporting elements adapted to be moved between said spaced projecting portions of said workpiece to move into and out of supporting engagement with said drill, means mounted on said carriage for moving said elements into and out of said supporting engagement with said drill, and cooperating means on said carriage and said base for automatically actuating said last named means during movement of said carriage along said base.

3. A deep drilling machine for drilling on opening through a plurality of spaced projecting portions of a workpiece such as a hinge or the like,

said machine comprising a base, a carriage mounted on said base for movement therealong, means mounted on said carriage for mounting and rotating an elongated drill, means mounted on said base for holding a workpiece to be drilled, means for moving said carriage along said base to move said drill toward and through said workpiece, drill positioning means mounted on said carriage in spaced relation to said first named means and including drill supporting elements adapted to be moved between said spaced projecting portions of said workpiece to move into and out of supporting engagement with said drill, and means mounted on said carriage for moving said elements into and out of said supporting engagement with said drill, said drill supporting elements being disposed to engage said drill adjacent the cutting end thereof.

4. A deep drilling machine for drilling an opening through a plurality of spaced projecting portions of a workpiece such as a hinge or the like, said machine comprising a base, a carriage mounted on said base for movement therealong, means mounted on said carriage for mounting and rotating an elongated drill, means mounted on said base for holding a workpiece to be drilled, means for moving said carriage along said base to move said drill toward and through said workpiece, drill positioning means mounted on said carriage in spaced relation to said first named means and including drill supporting elements adapted to be moved between said spaced projecting portions of said workpiece to move into and out of supporting engagement with said drill, and means mounted on said carriage for moving said elements into and out of said supporting engagement with said drill, the spacing of said drill supporting elements relative to the end of said drill being so proportioned relative to the spacing between said projections on said workpiece that said elements may be moved into said supporting engagement with said drill to accurately position the cutting end of said drill during its entry into each of said projections on said workpiece.

5. A deep drilling machine for drilling an opening through a plurality of spaced projecting portions of a workpiece such as a hinge or the like, said machine comprising a base, a carriage mounted on said base for movement therealong, means mounted on said carriage for mounting and rotating an elongated drill, means mounted on said base for holding a workpiece to be drilled, means for moving said carriage along said base to move said drill toward and through said workpiece, drill positioning means mounted on said carriage in spaced relation to said first named means and including drill supporting elements adapted to be moved between said spaced projecting portions of said workpiece to move into and out of supporting engagement with said drill, and means mounted on said carriage for moving said elements into and out of said supporting engagement with said drill, the spacing of said drill supporting elements relative to the end of said drill being so proportioned relative to the spacing between said projections on said workpiece that said elements may be moved into said supporting engagement with said drill to accurately position the cutting end of said drill during its entry into each of said projections on said workpiece, and cooperating means on said carriage and said base for automatically actuating said last named means whereby said elements are moved into said supporting engagement with said drill to accurately position the cutting end of the drill during its entry into each of said projections.

6. A deep drilling machine for drilling an opening through a plurality of spaced projecting portions of a workpiece such as a hinge or the like, said machine comprising a base, a carriage mounted on said base for movement therealong, means mounted on said carriage for mounting and rotating an elongated drill, means mounted on said base for holding a workpiece to be drilled, means for moving said carriage along said base to move said drill toward and through said Workpiece, drill positioning mean mounted on said carriage in spaced relation to said first named means and including drill supporting elements adapted to be moved between said spaced projecting portions of said workpiece to move into and out of supporting engagement with said drill, and means mounted on said carriage for moving said element into and out of said supporting engagement with said drill, the spacing of said drill supporting elements relative to the end of said drill being so proportioned relative to the spacing between said projections on said workpiece that said elements may be moved into said supporting engagement with said drill to accurately position the cutting end of said drill duringits entry into each of said projections on said workpiece, and cooperating means on said carriage and said base for automatically actuating said last named means whereby said elements are moved into said supporting engagement with said drill to accurately position the cutting end of the drill during its entry into each of said projections and automatically retracting said elements to prevent interference between said elements and said projections during movement of said carriage along said base.

7. A deep drilling machine for drilling an opening through a plurality of spaced projecting portions of a workpiece such as a hinge or the like, said machine comprising a base, a carriage mounted on said base for movement therealong, means mounted on said carriage for mounting and rotating an elongated drill, means mounted on said base for holding a workpiece to be drilled, means for moving said carriage along said base 10 to move said drill toward and through said workpiece, drill positioning means mounted on said carriage in spaced relation to said first named means and including drill supporting elements adapted to be moved between said spaced projecting portions of said work-piece to move into andout of supporting engagement with said drill, means mounted on said carriage for moving said elements into and out of said supporting engagement with said drill, and means mounted on said base and adapted to rotatably support said drill at a plurality of points along said base intermediate said workpiece and said first named means.

8. A deep drilling machine for drilling an opening through a plurality of spaced projecting portions of a workpiece such as a hinge or the like, said machine comprising a base, a carriage mounted on said base for movement therealong, means mounted on said carriage for mounting and rotating an elongated drill, means mounted on said base for holding a workpiece to be drilled, means for moving said carriage along said base to move said drill toward and through said workpiece, drill positioning means mounted on said carriage in spaced relation to said f rst named means and including drill supporting elements adapted to be moved between said spaced projecting portion of said workpiece to move into and out of supporting engagement with said drill, means mounted on said carriage for moving said elements into and out of said supporting engagement with said drill, means mounted on said base and adapted to rotatably support said drill at a plurality of points along said base intermediate said workpiece and said first named means, and means for rendering said last named mean inoperative at each of said plurality of points as it is approached by said first named means.

9. A deep drilling machine for drilling an opening through a plurality of spaced projecting portions of a workpiece such as a hinge or the like, said machine comprising a base, a carriage mounted on said base for movement therealong, means mounted on said carriage for mounting and rotating an elongated drill, means mounted on said base for holding a workpiece to be drilled, means for moving said carriage along said base to move said drill toward and through said workpiece, drill positioning means mounted on said carriage in spaced relation to said first named means and including drill supporting elements adapted to be moved between said spaced projecting portions of said workpiece to move into and out of supporting engagement with said drill, and means mounted on said carriage for moving said elements into and out of said supporting engagement with said drill, said last named means comprising resilient means urging said elements in one direction and selectively operable means adapted to move said elements in the opposite direction against the action of said resilient means.

10. A deep drilling machine for drilling an opening through a plurality of spaced projecting portions of a workpiece such as a hinge or the like, said machine comprising a base member, a carriage member mounted on said base member for movement therealong, means mounted on said carriage member for mounting and rotating an elongated drill, means mounted on said base member for holding a workpiece to be drilled, means for moving said carriage member along said base member to move said drill toward and through said workpiece, drill positioning means mounted on said carriage member in spaced relation to said first named means and including drill supporting elements adapted to be moved between riage member for moving said elements into and out of said supporting engagement with said drill, said last named means comprising resiilent means urging said elements in one direction into said supporting engagement with said drill and solenoid means adapted upon energization thereof to move said elements in the opposite direction.

11. A deep drilling machine for drilling an opening through a plurality of spaced projecting portions of a workpiece such as a hinge or the like, said machine comprising a base member, a carriage member mounted on said base member for movement therealong, means mounted on said carriage member for mounting and rotating an elongated drill, means mounted on said base member fo holding a workpiece to be drilled, means for moving said carriage member along said base member to move said drill toward and through said workpiece, drill positioning means mounted on said carriage member in spaced relation to said first named means and including drill supporting elements adapted to be moved between said spaced projecting portions of said workpiece to move into and out of supporting engagement with said drill, means mounted on said carriage member for moving said elements into and out of said supporting engagement with said drill, said last named means comprising resilient means urging said elements in one direction into said supporting engagement with said drill and solenoid means adapted upon energization thereof to move said elements in the opposite direction, switch means mounted on one of said members, and cam means mounted on the other of said members and proportioned to actuate said switch means to withdraw said elements from engagement to prevent interference between said elements and said workpiece during movement of said carriage member along said base.

12. A deep drilling machine for drilling an opening through a plurality of spaced projecting portions of a workpiece, which portions are disposed along a gentle curve, said machine comprising a base, a carriage mounted on said base for movement therealong, means mounted on said carriage for mounting and rotating an elongated drill, means mounted on said base for holding said workpiece, means for moving said carriage longitudinally of said base to move said drill toward and through said workpiece, drill positioning means mounted on said carriage in spaced relation to said first named means and ineluding drill supporting members adapted to be moved between said spaced projecting portions of said workpiece to move into and out of supporting engagement with said drill and means mounted on said carriage for moving said members into and out of said supporting engagement with said drill, and cooperating means on said carriage and said base for moving said drill positioning means transversely of said base during movement of said carriage longitudinally thereof whereby said drill positioning means follows said curve along which said projecting portions of said workpiece are disposed.

13. A deep drilling machine for drilling an opening through a plurality of spaced projectin ortions of a workpiece, which portions are disposed along a gentle curve, said machine comprising a base, a carriage mounted on said base for movement therealong, means mounted on said carriage for mounting and rotating an elongated drill, means mounted on said base for holding a said workpiece, means for moving said carriage longitudinally of said base to move said drill toward and through said workpiece, drill positioning means mounted on said carriage in spaced relation to said first named means and including drill supporting members adapted to be moved between said spaced projecting portions of said workpiece to move into and out of supporting engagement with said drill and means mounted on said carriage fo moving said members into and out of said supporting engagement with said drill, and cooperating means on said carriage and said base for moving said drill positioning means transversely of said base during movement of said carriage longitudinally thereof whereby said drill positioning means follows said curve along which said projecting portions of said workpiece are disposed, said last named means comprising cam means on said base, cam follower means on said drill positioning means, and means mounted on said carriage urging said cam follower means against said cam means.

ROGER G. CUDINI.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 596,782 Mason Jan. 4, 1898 1,219,078 Calahan Mar. 13, 1917 1,389,399 Trosch Aug. 20, 1921 2,507,503 Cudini May 16, 1950 

